Copper-NickelBeryllium-freeIn production
K5B
CuNi14Mn4Al2
K5B is a CuNi14Mn4Al2 alloy supplied as bars for submarine, naval and subsea equipment. It resists marine corrosion and erosion, limits fouling and resists galling, including against stainless steel.
400–430 MPaYield strength
710–725 MPaTensile strength
18 %Elongation
190 HBHardness HB
Specify this grade
Qualification packs are released after a short form. Export control applies.
Properties
Guaranteed values, by temper.
- Alloy family
- Copper-Nickel
- Chemistry family
- CuNiMnAl
- Lead-free
- Yes
Forms
Forms & dimensions available
Bars4 variant(s)
Dimensional ranges and tolerances on request — machining and finishing are in house.
Standards
Standards & equivalences
- DEFSTAN 02-835
- DOD-C-24676
- NES 835
Product and process qualifications are listed above. Customer approvals are confidential and are not disclosed.
Applications
Markets & applications
Applications
- Fasteners and control elements for submarines
- Pump shafts, mechanical seals and winch components
- Weapons handling equipment
- Subsea bolting and valve spindles
- Hydraulic pistons, cylinders and pressure couplings
Why this grade
Galling resistance, especially against stainless steels.
Good anti-fouling properties in seawater.
No hydrogen embrittlement, and galvanic compatibility with stainless steel.
Compliant with NES 835, DEFSTAN 02-835 and DOD-C-24676.
Alternatives
If this grade is not the right trade-off.
GradeChemistryYield strengthChoose it when
C97 ZeSTCuNi
Niclal 02RCuNi
Niclal 08RCuNi
Niclal 13RCuNi
Niclal 15RCuNi
Niclal 23RCuNiMn
Niclal 25RCuNi
Niclal 30ACuNiMn
Niclal 30A FeCuNiMn
Niclal 30BCuNi
Niclal 30B FeCuNiMn
Niclal 30DCuNiMn
Niclal 30RCuNi